Ceiling or wall box.



No. 727,842. 7 'PATENTED MAY 12, 1903.

, J. T. ROBB.

CEILING ORWALL BOX.

APPLIIOATIOH FILED NOV. 12, 1902.

10 MODEL.

Witnesses: a Inventor "I I I i Attorneys m: NORRIS Pnzns c0,PHOTO-LITHQ, WASHINGTON, n c.

ilrvrrno STATE Patented May 12, 1903.

PATENT FFICE.

JAMES T. ROBE, OF BROOKLYN, NEl/V YORK, ASSIGNOR TO THE MITCHELL VANCECOMPANY, OF NEWV YORK, N. Y., A CORPORATION OF NEW YORK.

CEILING OR WALL BOX.

SPECIFICATION forming part of Letters Patent No. 727,842, dated May 12,1903.

Application filed November 12,1902. $erial No. 130,966. (No model- Toall whom it may concern.-

Be it known that I, JAMES T. ROBB, a subject of the King of GreatBritain, residingat Flatbush, in the borough of Brooklyn, city of 5 NewYork, State of New York, have invented a certain new and usefulImprovement in Cell:

ing or Wall Boxes, of which the following is a description.

My invention relates to improvements in in ceiling and wall boxes forelectric-light fix- Iu res, and has for its object to produce a deviceof the type employing an ordinary ceiling or wall box, (or junction-box,as it is commonly called,) having mounted therein an insulated nipplefor the support of the electric-light fixture,thereby doing away withIhe objectionable insulating-joint and making the deviceextreinelysimple, durable, and inexpensive.

In order that the invention may be better understood, attention isdirected to the accompanying drawings, forming a part of thisspecification, and in which 1 Figure 1 is a vertical section throughajune tiou-box embodying my present improvements, and Fig. 2, a sectionon the line 2 2 of Fig. 1.

In both of the views corresponding parts are represented by the samenumerals of ref- 0 erence.

The box 1 is made as heretofore, preferably of cast-iron, and isprovided with a cover 2, having an opening therein through which passesthe fixture. The top of the box is cast with an integral tapering sleeve3, square in cross-section (see Fig. 2) and having a countersunk portion4 for receiving a plate 5, adapted to be screwed in place. The nipple isprovided with a wedge-shaped head 6, fit- 0 ting into the sleeve 3 andinsulated therefrom in any suitable way, preferably by means of fourpieces of insulating material 7. Above the head 6 is placed a layer ofinsulation 8, so that by screwing the plate 5 tightly in place the partswill be held snugly in position within the sleeve 3. Below the sleeve 3is a layer of insulation 9, surrounding the nipple and held in place bya nut or threaded Washer 10, engaging the threads of the nipple. Abovethe insulating layer 9 and supported by the same is a collar 11, ofinsulating material,

which surrounds the sleeve 3 and insulates the same. This collar is heldsnugly in place by forcing home the nut 10, as will be understood.

The broadest features of the invention are not claimed in the presentapplication, which relates to a joint formed integrally with a wall ofthe junction-box. The joint per se is to form the subjectmatter of andbe claimed in an application for patent to be made subsequently. (SerialNo. 133,878, filed December 4., 1902.)

Having now described my invention, what I claim is- 1. As a newmanufacture, a ceiling or wall box formed with an integral taperingsleeve in its top, and a nipple depending from said sleeve and having awedge-shaped head engaging the same, with insulatingmaterial between thenipple aud sleeve, substantially as set forth.

2. As a new manufacture, a ceiling or wall box formed with an integraltapering sleeve in its top, anipple depending from said sleeve andhaving a Wedge-shaped head engaging the same, with insulating materialbetween the nipple and sleeve, and a plate secured to the top of the boxabove said head, substantially as set forth.

3. As a new manufacture, a ceiling or wall box formed with an integraltapering sleeve in its top, a nipple depending from said sleeve andhaving a wedge-shaped head engaging the same, with insulating materialbetween the nipple and sleeve, and a countersunk plate secured to thetop of the box above said head, substantially as set forth.

4. As a new manufacture, a ceiling or wall box cast with an integraltapering sleeve, a nipple depending from said sleeve and having awedge-shaped head engaging the same, insulating material between thenipple and sleeve, and an insulating-collar surrounding the sleeve,substantially as set forth.

5. As a new manufacture, a ceiling or wall box cast with a taperingsleeve, a nipple depending from the sleeve and having a wedge shapedhead which engages the sleeve, insulating material between the head ofsaid nipple and the sleeve, a layer of insulating material surroundingthe nipple and engaging the bottom face of the sleeve, and a threadednut on the nipple for holding said insulating layer in position,substantially as set forth.

6. As a new manufacture, a ceiling or wall 5 box cast with a taperingsleeve, a nipple depending from the sleeve and having a wedgeshaped headwhich engages the sleeve, insulating material between the head of saidnipple and the sleeve, a layer of insulating IO material surrounding thenipp ie and engaging the bottom face of the sleeve, a threaded nut onthe nipple for holding said insulating layer in position, and aninsulating-collar supported by the insulating layer and surrounding thesleeve, substantially as set forth.

This specification signed and witnessed this 11th day of November, 1902.

' JAMES T. ROBB.

Witnesses:

FRANK L. DYER, J NO. R0131". TAYLOR.

